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    <button type="button" >基本按钮</button>

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        <button type="button" class="btn btn-default">基本按钮1</button>
        <button type="button" class="btn btn-primary">基本按钮2</button>
        <button type="button" class="btn btn-success">基本按钮3</button>
        <button type="button" class="btn btn-info">基本按钮4</button>
        <button type="button" class="btn btn-warning">基本按钮5</button>
        <button type="button" class="btn btn-danger">基本按钮6</button>
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    <hr/>
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        <button type="button" class="btn btn-default btn-lg">基本按钮1</button>
        <button type="button" class="btn btn-primary btn-sm">基本按钮2</button>
        <button type="button" class="btn btn-success btn-xs">基本按钮3</button>
        <button type="button" class="btn btn-info active">基本按钮4</button>
        <button type="button" class="btn btn-warning btn-block">基本按钮5</button>
        <button type="button" class="btn btn-danger btn-link">基本按钮6</button>
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